???

These links are for.......

1) Takata airbags (not used in X5) that have a propellant defect, causing them to deploy incorrectly DURING an inpact.

and.....

2) Seat occupant sensor mat that, when defective, keeps airbag from deploying DURING an accident while seat is occupied.

These links in no way address the OPs issue, random airbag deployment.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!